Because Golden Gumball and Shadow Gumball will be active on that night,and when they get in the office,they’ll disable your ability to go to the 2nd Room,and your use of the cameras. For the defense mechanism,it remains up to you,here’s a hint:
“Keep them closed,danger grows.”

If your guesses are all wrong,then,i’ll post a screenshot of the defense mechanism against the 2 of them. And as a bonus,the designs of Shadow Gumball and Golden Gumball will be uploaded in another devlog. So,guess them right,and if you get them wrong,i’ll do those things as punishments for you guys. So,good luck finding it out.